The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2002
Filed:
Mar. 10, 2000
Maurice Brunet, Pres Vernon, FR;
Eric Helene, Oissel, FR;
Societe de Mecanique Magnetique, Saint-Marcel, FR;
Abstract
A rotary pump (PP) for taking in a liquid such as a hydrocarbon comprises a pump wheel ( ) secured to a rotor ( ) which is immersed in a portion of the liquid taken in by the pump. A motor ( ) having a stator element ( ) mounted in a case ( ) and a rotor element ( ) mounted on the rotor ( ) serves to cause the rotor ( ) to rotate about an axis ( ). Radial magnetic bearings ( ) and axial magnetic bearings ( ) support and guide the rotor ( ) inside an enclosure ( ). A jacket ( ) is provided to protect the stator element ( ) of the motor ( ) from the liquid. The pump is characterized in that the rotor ( ) has at least one groove ( ) in an outer surface that is covered by the liquid, particularly to reduce the inertial effects due to the liquid.